# Nurikabe

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Nurikabe is a logic puzzle with a bit complicated rules and challenging solutions.

The rules are not so simple. :)
You have a grid of squares Some cells of the grid start containing numbers. The goal is to determine whether each of the cells of the grid is "black" or "white" (Islands in the Stream calls these "water" and "land" respectively). The black cells form "the nurikabe" (Islands in the Stream calls it "the stream"): they must all be orthogonally contiguous (form a single polyomino), number-free, and contain no 2x2 or larger solid rectangles (Islands in the Stream calls such illegal blocks "pools"). The white cells form "islands" (which is where Islands in the Stream got its name): each number n must be part of an n-omino composed only of white cells. All white cells must belong to exactly one island; islands must have exactly one numbered cell. Solvers will typically shade in cells they have deduced to be black and dot (non-numbered) cells deduced to be white.
Left click on a square to make it black. Right click to mark with dot. Click and drag to mark more than one square.

Video Tutorial
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This Month
1. asdfhavcjklcjkl 00:02.23
2. A2Ragnell
17
00:02.73
3. miggy
68
00:02.79
4. kennethaw88
112
00:02.88
5. Xarpe
11
00:02.89
6. wypeng 00:03.17
7. puzzleist
44
00:03.19
8. CP2023 00:03.35
9. fishelstix 00:03.37
10. mathandplants 00:03.81
11. guvnor 00:03.91
12. Absofruitly 00:04.09
13. John9439
62
00:04.26
14. Oryn
122
00:04.68
15. yoshibaroshi
7
00:04.99
16. monkyDluffy 00:05.65
17. Sombro64 00:05.74
18. Mysterium
12
00:05.88
19. wam3988 00:06.18
20. ZebraKing
44
00:06.38
This Week
1. asdfhavcjklcjkl 00:02.23
2. A2Ragnell
17
00:02.73
3. Xarpe
11
00:02.89
4. CP2023 00:03.88
5. Absofruitly 00:04.09
6. Oryn
122
00:04.68
7. Mysterium
12
00:05.88
8. wam3988 00:06.18
9. Nic0rasu 00:06.59
10. ScorpionMax 00:07.95
11. Axin0627 00:08.66
12. luhgod
6
00:09.26
13. Kyra05
44
00:09.98
14. 리링
38
00:09.99
15. JUSTIN_Puzzle
8
00:11.48
16. figma
18
00:11.93
17. Kenolo353
74
00:15.04
18. Joris Brouwer
18
00:15.31
19. alaya23
6
00:16.17
20. wonggaaisan 00:40.09
Today
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MO3
1. vowels
200
00:01.35
2. Douglas Shamlin Jr.
524
00:01.48
3. nabi
92
00:01.64
4. haramey
152
00:01.70
5. BingBongBob
107
00:01.76
6. sfumato
164
00:01.78
7. jaybrainer
162
00:01.83
8. bearn
185
00:01.91
9. jai22933
22
00:02.19
10. IHNN1
12
00:02.28
AO5
1. vowels
200
00:01.43
2. nabi
92
00:01.50
3. Douglas Shamlin Jr.
524
00:01.51
4. haramey
152
00:01.78
5. jaybrainer
162
00:01.79
6. BingBongBob
107
00:01.88
7. sfumato
164
00:01.89
8. bearn
185
00:01.93
9. jai22933
22
00:02.29
10. IHNN1
12
00:02.36
AO12
1. vowels
200
00:01.70
2. Douglas Shamlin Jr.
524
00:01.75
2. nabi
92
00:01.75
4. haramey
152
00:02.06
5. bearn
185
00:02.24
6. BingBongBob
107
00:02.27
7. sfumato
164
00:02.29
8. jaybrainer
162
00:02.32
9. jai22933
22
00:02.61
10. qqwref
258
00:02.83
Robots / programmatic solversinfo
1.nbjohnson00:00.407
2.Charlie Li
61
00:00.420
3.mediteran13
54
00:03.440

* MO3 - Mean of 3. The average of 3 consecutive times.
AO5 - Average of 5. The average of 5 consecutive times ignoring the highest and the lowest.
AO12 - Average of 12. The average of 12 consecutive times ignoring the highest and the lowest.
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2023-12-03 20:23:49

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